Sound Options Greyed Out

My office just bought several Toshiba Portege M800 (PPM817-05602D) and we've downgraded them to Windows XP. I've found and installed all the drivers (Device Manager says that they're all working). Everything works as it should except the sound. When I attempt to go into the Sound options in the Control Panel everything is greyed out and it says a device can't be found.

I've done the following

- re-installed the sound drivers
- un-installed and re-installed the device in the device manager
- tried a slew of other sound drivers in a desperate attempt
- BIOS settings (there are no sound settings in the BIOS)

Any input would be greatly appreciated.
skyriacAsked:
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skyriacAuthor Commented:
The issue here was the Conexant driver.

Though there were no yellow !'s in the Device Manager, and the device was recognized and listed as working in the device manager, the "XAudioService" would not start, and thats where the problem lied.

After trying about 30 different drivers, i FINALLY stumbled upon the driver that did the trick.

I have attached the driver file that worked for me.
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LeeTutorretiredCommented:
Type SERVICES.MSC in the Run dialog box.  Scroll down to check if the Windows Audio service is running.  If not, double click it and set the Startup Type to Automatic and click on the services's Start button.
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DMTechGrooupCommented:
http://forums.computers.toshiba-europe.com/forums/thread.jspa?messageID=144594

I was able to downgrade my Portege M800-PPM81C to Windows XP Pro. All the drivers have been installed.

The previous posts re: sound card and soft modem is right. The sound card driver will only work if SP3 is installed first. Other work around if SP2 is preferred is to download just the HD Audio support from microsoft.
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skyriacAuthor Commented:
LeeTutor : The windows audio component has been started and is listed as an automatic startup, so unfortunately that's not the issue.

DMTechGrooup : Service Pack 3 has been installed all along. I slipstreamed it into the original windows installation with nLite (as well as the SATA drivers), so unfortunately it doesn't look like this is the problem either.

Thank you both for your input, however I am still up a creek without a paddle on this one.
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LeeTutorretiredCommented:
Well, I've searched through the E-E data base with the search terms "sound options greyed out", and the only consistent solution I've found that has worked for some and might work for you is to do a repair install of XP.  This is a very good page on how to perform an XP Repair Install, which will preserve your data and programs:

http://www.michaelstevenstech.com/XPrepairinstall.htm
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skyriacAuthor Commented:
Lee, thanks again for your input. I am sad to say that neither a repair nor complete XP re-install did the trick.

Seeing how we have several of these machines, I'm going to try another machine to see if it's specific to that computer. I'm not convinced this will work because when the machine started up in Vista it made that "vista startup noise" which leads me to believe there are no issues with the sound card or speaker.
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DMTechGrooupCommented:
Install XP with just SP 2.. then follow the steps outlined in the link I provided..  Could be the SP3 slip stream is causing the problem.
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skyriacAuthor Commented:
Still no luck unfortunately.

Does the fact the driver isn't signed have anything to do with it?

It's the conexant 221 driver straight from the toshiba support website.
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DMTechGrooupCommented:
If you have resolved this I think it would be better to explain what it took to get it working then accept your answer as the reason so others who might have the same issue can find this thread.  Thanks.
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DMTechGrooupCommented:
Can you provide a link to the driver?
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